title: Invited commentary.
authors.affiliation: Department of Thoracic Surgery, Shanghai Chest Hospital, 241 Huaihai Rd W, Shanghai, China 200030. vwtfang@hotmail.com
authors.forename: Wentao
authors.initials: W
authors.lastname: Fang
mesh_terms: D002289:Carcinoma, Non-Small-Cell Lung / Q000556:secondary*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008198:Lymph Nodes / Q000473:pathology*; D008297:Male; D009367:Neoplasm Staging / Q000379:methods*